Tracy, Yvon Group,
Had not considered 2 stroke buildup in sump from that angle Tracy...........Are rotor side seals
there to keep sump oil out of the combustion chamber , help contain compression , or a combination
of both..............I theorized that warn seals and "O" rings would allow excess 2 stroke oil past them
by essentially riding over the oil film (hydroplaning) at high rpm.............
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Kelly Troyer
All of the world is a unit pressure problem.
Racing oil scrapers are ground at a steeper angle, so as to generate a higher unit pressure with a single spring. The stock scrapers work just fine if installed as new, And the springs are installed for the correct side of the rotor. The springs are handed, and there are front and back springs. The correct spring locks the scraper to the rotor, so they turn as one. The incorrect spring allows the scraper to rotate in its groove, and wear out the "O" ring. The scrapers have no end gaps.
The side seals have a minimum end gap at one end. Usually .004" is the wear limit. I set mine at zero.
If the corner seal and side seal will return when depressed together, I regard that as adequate.
Side seals do not control oil. Just compression. The corner seal pushes one side seal each around the iron, and generally only wear on one end. Note that corner seals have a wear mark where the side seal touches.
Renesis side seals need more clearance to allow for exhaust heat on the rotor sides.
Lynn E. Hanover
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